Heater



(No Model.)

G. M. EDWARDS.

HEATER.

No. 466,092. Patented Deo. 29, 1891.

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UNITED STATES PATENT OFFICE.

GRANVILLE M. EDWARDS, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE HALE TO WILLIAM E. DENNISON, OF PORTLAND, MAINE.

HEATER.

SPECIFICATION forming part of Letters Patent No. 466,092, dated December 29, 1891.

Application filed January 28, 1891. Serial No. 379.468. (No model.)

To all whom it may concern: of the hemispherical partition down upon the Be it known that I, GRANVILLE M. ED- top of each coil, due to the decreasing diame- WARDS, of Boston, in the county of Suffolk ter of each coil. The heating capacity of a and State of Massachusetts, have invented given heater is thus greatly increased. It is 5o 5 certain newand useful Improvements in Heatnecessary that the hemispherical partition be ers; and I do herebydeclare that the following perforated, in order that the smoke and gases is a full, clear, and exact description of the inmay pass olii'. vention, which will enable others skilled in In order that the heater may be safe in case the art to which it appertains to make and of being overturned and not allow the hot 55 IO use the same, reference being had to the acashes to escape through the smoke-flue, the companying drawings, and to letters of reend a of said fine extends downward some ference marked thereon, which form a part distance into the heater and the top of the of this specification. hemispherical partition is made solid where My invention relates to improvements in it comes directly under said flue, so that any 6o r 5 heaters, and specially to hot-water heaters. ashes that might by chance pass through the It consists in a peculiar arrangement of the said partition would be caught in the top Z of water-pipes, a hernispherical perforated drum the heater-case and could not pass through placed between the said pipes and the top of the flue. the case, and a safety device for preventing Having thus described myinvention and its 65 zo the escape of hot coals through the smoke-flue use, what I claim, and desire to secure by Letin case of the overturning of the heater. ters Patent of the United States, is

In the drawings herewith accompanying l. Inaheater,the combination,withahen1i and making a part of this specification, Figspherical perforated partition attached to the ure 1 is a vertical section; Fig. 2, a vertical casing of the fire-chamber between the fire- 7o 25 section of hemispherical partition. pit and the smoke-flue, of a pipe having the The same letters refer to like parts. form of a coil of gradually-decreasing diame- In said drawings', a represents the flue; b, ter located between said perforated partition the heater-casing; c, the hemispherical partiand said lire-pit, substantially as and for the tions having perforations r; e, the pipe below purposes set'forth. 75

3o the feed-door; cl, the pipe above the feed- 2. In aheater having asuitable casing and door, and f the heater-lining. The water-pipe a smoke-flue extending downward into said enters the heater near the top of said lining, casing, the combination, with a hemispherical and is coiled around several times until near partition having that part which comes dithe feed-door, as indicated by that part of the rectly beneath said flue solid and the re- 8o 3 5 pipes marked e, thence extends directly upmainder perforated, of a pipe having the forni ward at the side to a point above the feedof a coil of gradually-decreasing diameter door, thence in a series of coils, each sncceedlocated between said partition and the fireing one having aless diameter, until it reaches pit, substantiallyas and for the purposes set nearly to the top of the hemispherical partiforth. 85 4o tion, thence passing out of the heater to the In testimony that I claim the foregoing as circulating system. my own I affix my signature in presence of The advantages of the arrangement of the two witnesses. pipes herein illustrated consist in the fact GRANVILLE M. EDWARDS. that the hot air rises and strikes directly Witnesses: 45 against the under side of each coil, and in ad- FRANK O. PURINGTON,

dition the hot airis reflected from the inside ELGIN C. VERRILL. 

